542443616321 has 2 divisors, whose sum is σ = 542443616322. Its totient is φ = 542443616320.

The previous prime is 542443616293. The next prime is 542443616353. The reversal of 542443616321 is 123616344245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541643009296 + 800607025 = 735964^2 + 28295^2 .

It is a cyclic number.

It is not a de Polignac number, because 542443616321 - 2²² = 542439422017 is a prime.

It is not a weakly prime, because it can be changed into another prime (542443619321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271221808160 + 271221808161.

It is an arithmetic number, because the mean of its divisors is an integer number (271221808161).

Almost surely, 2^542443616321 is an apocalyptic number.

It is an amenable number.

542443616321 is a deficient number, since it is larger than the sum of its proper divisors (1).

542443616321 is an equidigital number, since it uses as much as digits as its factorization.

542443616321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 41.

The spelling of 542443616321 in words is "five hundred forty-two billion, four hundred forty-three million, six hundred sixteen thousand, three hundred twenty-one".